CN106932964A - Optical film - Google Patents
Optical film Download PDFInfo
- Publication number
- CN106932964A CN106932964A CN201710070956.2A CN201710070956A CN106932964A CN 106932964 A CN106932964 A CN 106932964A CN 201710070956 A CN201710070956 A CN 201710070956A CN 106932964 A CN106932964 A CN 106932964A
- Authority
- CN
- China
- Prior art keywords
- film
- polyethylene terephthalate
- axis
- terephthalate film
- stretching polyethylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012788 optical film Substances 0.000 title claims abstract description 66
- 239000010408 film Substances 0.000 claims abstract description 244
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 71
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 71
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 52
- 230000003287 optical effect Effects 0.000 claims description 47
- 239000000203 mixture Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 62
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 61
- 229920006254 polymer film Polymers 0.000 description 56
- 239000000463 material Substances 0.000 description 28
- 229920002799 BoPET Polymers 0.000 description 24
- 230000010287 polarization Effects 0.000 description 23
- 230000005540 biological transmission Effects 0.000 description 17
- 238000000034 method Methods 0.000 description 17
- 239000011521 glass Substances 0.000 description 14
- 239000011230 binding agent Substances 0.000 description 13
- 238000009792 diffusion process Methods 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 239000004973 liquid crystal related substance Substances 0.000 description 12
- 239000012528 membrane Substances 0.000 description 11
- 239000004417 polycarbonate Substances 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000005001 laminate film Substances 0.000 description 10
- 229920010524 Syndiotactic polystyrene Polymers 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 229920000515 polycarbonate Polymers 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 230000000007 visual effect Effects 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000004425 Makrolon Substances 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 5
- 239000003431 cross linking reagent Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000009998 heat setting Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 5
- 239000002987 primer (paints) Substances 0.000 description 5
- 230000000644 propagated effect Effects 0.000 description 5
- 229920003270 Cymel® Polymers 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 230000003098 cholesteric effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 3
- 239000004640 Melamine resin Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 230000010355 oscillation Effects 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
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- 238000006277 sulfonation reaction Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 3
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 2
- 229940043276 diisopropanolamine Drugs 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000005226 mechanical processes and functions Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920005597 polymer membrane Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007767 slide coating Methods 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- KFUSEUYYWQURPO-UHFFFAOYSA-N 1,2-dichloroethene Chemical compound ClC=CCl KFUSEUYYWQURPO-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- CCJAYIGMMRQRAO-UHFFFAOYSA-N 2-[4-[(2-hydroxyphenyl)methylideneamino]butyliminomethyl]phenol Chemical compound OC1=CC=CC=C1C=NCCCCN=CC1=CC=CC=C1O CCJAYIGMMRQRAO-UHFFFAOYSA-N 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- 229920001634 Copolyester Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 229920000954 Polyglycolide Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 229920006322 acrylamide copolymer Polymers 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002999 depolarising effect Effects 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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- 239000003292 glue Substances 0.000 description 1
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004633 polyglycolic acid Substances 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
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- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
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- 239000012748 slip agent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- KUCOHFSKRZZVRO-UHFFFAOYSA-N terephthalaldehyde Chemical compound O=CC1=CC=C(C=O)C=C1 KUCOHFSKRZZVRO-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- NUBZKXFFIDEZKG-UHFFFAOYSA-K trisodium;5-sulfonatobenzene-1,3-dicarboxylate Chemical class [Na+].[Na+].[Na+].[O-]C(=O)C1=CC(C([O-])=O)=CC(S([O-])(=O)=O)=C1 NUBZKXFFIDEZKG-UHFFFAOYSA-K 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133543—Cholesteric polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/12—Biaxial compensators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/582—Recycling of unreacted starting or intermediate materials
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- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
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- Materials Engineering (AREA)
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Abstract
The invention discloses a kind of optical film, including：Reflection type polarizer, the reflection type polarizer has thang-kng axle；With stretching polyethylene terephthalate film, the stretching polyethylene terephthalate film has：X-axis, it is on maximum tension direction；Z-axis, its plane perpendicular to the stretching polyethylene terephthalate film；And y-axis, it is laminated on the reflection type polarizer perpendicular to both the x-axis and the z-axis, the stretching polyethylene terephthalate film；The refractive index n along the x-axis of wherein described stretching polyethylene terephthalate filmx, along the refractive index n of the y-axisyWith the refractive index n along the z-axiszSo that the stretching polyethylene terephthalate film has is directed to θ in following formulasfThe refractive index symmetric points that are given of solution：But, in the absence of for θ in following formulasaSolution：
Description
The application is the submission of on March 30th, 2009, entitled " optical film ", Application No. 200980114664.8
The divisional application of the application for a patent for invention of (international application no is PCT/US2009/038736).
Related application
Patent application claims are filed in the preferential of the U.S. Provisional Patent Application No.61/041112 on March 31 in 2008
Power, the disclosure of which is incorporated by reference in its entirety herein.
Hereinafter co-own and Co-pending U.S. Patent Application is herein incorporated by reference：U.S. Patent application
No.61/040,910, entitled " LOW LAYER COUNT REFLECTIVE POLARIZER WITH OPTIMIZED
GAIN " (there is the low layer number reflection type polarizer of optimized gain) (attorney 64121US002)；With United States Patent (USP) Shen
Please No.61/041092, entitled " ADHESIVE LAYER FOR Multilayer optical film " (be used for multilayer optical
Learn the adhesive phase of film) Jones et al. (attorney 64212US002).
Background technology
Historically, simple backlight arrangement only includes three kinds of primary clusterings：Light source or lamp, rear reflector and preceding expansion
Discrete piece.Such system is still general in advertising indicator board and domestic light application.
In recent years, in the consumer electronics industry to combining product (such as computer of liquid crystal display (LC displays or LCD)
Monitor, TV, mobile phone, digital camera, pocket type digital music player and other hand-held devices) rapid growth
Under the promotion of demand, this Basic Design to backlight is improved.LCD builds around LC panels, and because
LC panels itself will not produce light, thus LCD need light source-typically reached through LC panels observer reflection ring
Border light or the often light from backlight.
Improvement in terms of back light source technique is for example increasing brightness or reduce energy consumption, increase the uniformity and reduce thickness is
Target.Some usable light control films during these are improved realize, for example light-redirecting film (such as gain diffuser, turning film,
Prismatic brightness film etc.)；And allow reflective polarizer films that are more effective and efficiently using the light sent by the light source in backlight.
In addition to the need for improved technical performance, backlight manufacturer is also promoted by providing lower-cost product.
Summary of the invention
In one aspect, the present invention provides optical film, and optical film includes：Reflection type polarizer, it has thang-kng axle；And drawing
Stretched polymer film.Stretching polymer film has：X-axis, it is in maximum tension direction；Z-axis, it is flat perpendicular to stretching polymer film
Face；And y-axis, it is perpendicular to both x-axis and z-axis.Stretching polymer film is laminated on reflection type polarizer, and stretches polymerization
The aerial incidence angle of thing film has refractive index symmetric points relative to z-axis in x-z-plane into display at least about 60 degree angles.
On the other hand, the present invention provides optical film, and the optical film includes：Reflection type polarizer, it has thang-kng axle；With
Stretching polymer film.Stretching polymer film has：X-axis, it is in maximum tension direction；Z-axis, it is flat perpendicular to stretching polymer film
Face；And y-axis, it is perpendicular to both x-axis and z-axis.Stretching polymer film is attached on reflection type polarizer, and stretches polymerization
The aerial incidence angle of thing film has refractive index symmetrical relative to z-axis in x-z-plane into display at least about 60 degree angles
Point.Additionally, stretching polymer film includes non-existent polymeric material in reflection type polarizer.
On the other hand, the present invention provides optical film, and optical film includes：Reflection type polarizer, it has the first first type surface
With the second first type surface；With the first stretching polymer film, its first master meter that reflection type polarizer is laminated to first adhesive phase
On face.Optical film also includes：Second stretching polymer film, its second master that reflection type polarizer is laminated to second adhesive phase
On surface；And optical layer, it is set adjacent to the second stretching polymer film so that the second stretching polymer film is in optical layer and reflection
Between type polarizer.In this optical film, each in the first stretching polymer film and the second stretching polymer film is in air
In incidence angle into all showing with refractive index symmetric points at least about 90 degree.
On the other hand, the present invention provides display system, and display system has backlight；Backlight includes：Lighting device；
Reflection type polarizer, it has thang-kng axle；And stretching polymer film.Stretching polymer film has：X-axis, it is in maximum tension side
Upwards；Z-axis, it is perpendicular to strained polymer membrane plane；Y-axis, it is perpendicular to both x-axis and z-axis, and stretching polymer film quilt
It is arranged so that reflection type polarizer is located between lighting device and stretching polymer film.Stretching polymer film it is aerial enter
Firing angle has refractive index symmetric points relative to z-axis in x-z-plane into display at least about 60 degree angles.
On the other hand, the present invention provides display system, and display system has backlight, and wherein backlight includes：Polarization
Lighting device, its its there is polarization axle；And stretching polymer film.Stretching polymer film has：X-axis, it is in maximum tension direction
On；Z-axis, it is perpendicular to strained polymer membrane plane；And y-axis, it is perpendicular to both x-axis and z-axis.Stretching polymer film is set
Polarised light of the reception from polarized lighting device is set to, and the aerial incidence angle of stretching polymer film is in x-z-plane
There are refractive index symmetric points into display at least about 60 degree angles relative to z-axis.
On the other hand, the present invention provides display system, and display system has backlight, and wherein backlight includes that illumination is filled
Put and stretching polymer film.When in atmosphere with the incident angles less than about 50 degree to stretching polymer film, stretching is poly-
Compound film shows at least delay of 3000nm along all optical paths.
On the other hand, the method that offer of the present invention prepares optical film, the method includes forming stretching polymer film.Formed
Stretching polymer film includes：Form polyethylene terephthalate web；In longitudinal direction with the first amount stretched web, amount of tension is
About 1.05 to 1.3 times of non-stretched longitudinal dimension)；And in the horizontal with the second amount stretched web, amount of tension is non-stretched
About 3 to 7 times of transverse dimensions.Forming stretching polymer film also includes：Heat setting web；Laterally relaxing web；And
Laterally unrestrictedly and in the case where longitudinally minimum tension is born loosen web in an oven.
The aspects of the invention and other side will be evident that from detailed description below.However, in office
It is limitation to the theme for claiming that shall not be by foregoing invention content understanding in the case of what, and the theme is only by appended power
The restriction of sharp claim, and can be modified in course of the review.
Brief description of the drawings
Describe the present invention with reference to the accompanying drawings, wherein：
Fig. 1 is the schematic cross sectional views of one embodiment of display system.
Fig. 2 is the schematic diagram of birefringence optical film.
Fig. 3 is the conoscopic figure of the transmitted intensity of the transmission film stack for calculating, and film stack includes：Aligned adsorbent type is inclined
Shake piece；With biaxial stretch-formed PET film, it is arranged between polarizer.
Fig. 4 is the conoscopic figure of the transmitted intensity of the transmission film stack for calculating, and film stack includes：Aligned adsorbent type is inclined
Shake piece；The substantially PET film of uniaxial orientation, it is arranged between polarizer.
Fig. 5 is the graph of a relation of the retardation with incidence angle of multiple polymer films.
The graph of a relation of the PET that Fig. 6 is biaxially oriented three transmitted intensities of incidence angle and wavelength at 20 degree of azimuths.
The graph of a relation of the PET that Fig. 7 is biaxially oriented three transmitted intensities of incidence angle and wavelength at 5 degree of azimuths.
Fig. 8 is the pass of PET three transmitted intensities of incidence angle and wavelength at 20 degree of azimuths of substantially uniaxial orientation
System's figure.
Fig. 9 is the schematic cross sectional views of one embodiment of film stack.
Figure 10 shows the azimuth alignment of the substantially film of uniaxial orientation and polarizer.
Figure 11 is the schematic cross sectional views of one embodiment of multifunctional membrane.
Figure 12 is the graph of a relation of the storage modulus with temperature of the polymer film in tentering direction and longitudinal direction.
Figure 13 a are the depth of section of the film of example 1 and the graph of a relation of diagonal position.
Figure 13 b are the depth of section of the film of example 2 and the graph of a relation of diagonal position.
Specific embodiment
The present invention relates to economical, high performance optical film, and using the backlight and display of such film.
Liquid crystal display builds around LC panels, wherein the liquid crystal with related electrode matrix is inserted in a pair of absorption-types
Between polarizer.In LC panels, the part of liquid crystal changes its optical states by the electric field applied by electrode matrix.According to it
State, the given part (pixel or sub-pix with display are corresponding) of liquid crystal can more or less make the polarization transmitted from it
Light rotates.The optical states of the lcd segment that the light advanced through incident polarizer, liquid crystal and outgoing polarization piece runs into according to light
Decay to different degree.LC displays provided using this behavior different zones there are different outward appearances can be with electronics side
The display of formula control.
The backlight of LCD provides light to the LC panels of display, and it is had by the incident polarizer of light-transmitting panel
The light of " thang-kng " polarization state forms image.The light incided on LC panels with " delustring " polarization state is generally by incident polarizer
Absorb and expend.Therefore, it is contemplated that maximizing the light quantity of the thang-kng polarised light for reaching panel from backlight, and make
The light quantity for reaching the delustring polarised light of panel is minimized.
Make thang-kng polarised light maximize and make delustring polarised light minimize a kind of technology be in backlight and LC panels
Between set reflection type polarizer (RP), reflect back into the back of the body by thang-kng polarized light transmission to LC panels and by delustring polarised light
In light source.Then the delustring polarised light of reflection can be converted into by the light of polarization state, and saturating when meeting for the second time or subsequently
It was shot through RP.Therefore, reflection type polarizer allows to recycle the delustring polarised light that may be otherwise consumed at least
Part.
Backlight is also frequently utilized that the optical film in addition to reflection type polarizer to perform various functions.Herein will be further
The directed circulation of discussion is distributed using the angle that film (DRF) can be used to manage the light launched by backlight.Also will further beg for herein
The diffusion sheet of opinion can be used for multiple use, including improve the uniformity, shelter defect and prevent moire pattern outward appearance.Other
Film can play a part of non-optical function, for example, provide mechanical support, but be limited with the light interaction in backlight with them,
Typically it is desirable that the source such film will not produce adverse effect to the output of backlight.In addition, it is generally desirable to, used with one kind
The optical film on way is not intended to be otherwise caused to the performance reduction of backlight.
Consider above-mentioned construction, thang-kng polarised light is transferred to LC panels by wherein reflection type polarizer.Backlight design personnel
May want to be arranged on other optical films between RP and LC panels.In this case, it is generally desirable to, make to advance from RP
To LC panels light polarization state not by other optics membrane changes between two parties.The polarization effect of optical film between two parties is set to minimize or make
A kind of its approach for reducing is to form film by low (it is desirable that being isotropic) film of birefringence.For example, makrolon
(PC) (birefringence tends to low value) is considered as a kind of qualified selection of the optical film between RP and LC panels.The opposing party
Face, polyethylene terephthalate (PET) (its generally display has anisotropy higher) often is considered as being not suitable in RP
Used and LC panels between because by retardation rate caused by the birefringence in PET (or postpone) may be inadvisable change
The polarization state of the light advanced towards LC panels.
Backlight manufacturer would generally consider these effects and other factorses when backlight is designed.Manufacturer can avoid
Any film is set between RP and LC panels, and directed circulation can be arranged on by RP and LC faces using film with (on the contrary) selection
On the relative side of plate.Manufacturer can select using film to be arranged on directed circulation between RP and LC panels, and use PC conducts
Material for DRF is so that polarization effect is minimized, but cost ratio is high using PET.Similarly, it may be necessary to which reflection-type is inclined
The piece that shakes is laminated on another film, so as to obtain mechanical support, and can PC is used into this kind of mechanical base to avoid reducing optics
Performance.PET can provide preferable or qualified mechanical performance and can in this kind of application reduces cost, but optical property
Limit its purposes.Generally, the optical film that backlight manufacturer needs are made up of such material, the material causes performance to be applicable
In the possible minimum intended application of cost.
In the present invention, the purposes we talk of stretching polymer film (such as stretching PET) in the backlight, Yi Jiyong
In the method for preparing such film.Film of the invention provides suitable performance for many backlight applications, it is possible to for backlight system
Make business and bring the lower selection of cost.Specifically, (for example the reflection type polarizer of LC panels and enter for being arranged on polarizer
Penetrate polarizer) between polymer film, it has been found that film and the preferred orientation for film make to be caused by the birefringence of film
Worthless polarization effect minimize.
As described herein, optical film of the invention and backlight can be used for display system.Fig. 1 is the one of display system 100
The schematic cross sectional views of individual embodiment.Display system 100 includes LC panels 110 and is arranged to provide light to LC panels 110
Backlight 120.In certain embodiments, backlight 120 includes lighting device 130.Lighting device 130 and LC panels 110 it
Between backlight 120 in can include multiple optical elements, such as light control film, this will be discussed further herein.
As shown in figure 1, LC panels 110 include liquid crystal layer 112, incidence plate 114 and outgoing plate 116.Incidence plate 114 and outgoing
One of plate 116 or both includes glass or polymeric substrates, electrode matrix, oriented layer, polarizer, and (including dichroism is inclined
Shake piece), compensation film, protective layer and other layers.Can also be by any in matrix of color filters and incidence plate 114 and outgoing plate 116
Person or both is included, for color is attached on the image shown by LC panels 110.
In LC panels 110, the part of liquid crystal layer 112 changes its optical states by the electric field applied by electrode matrix.
According to its state, the given part (pixel or sub-pix with display system 100 are corresponding) of liquid crystal layer 112 can make to be passed through from it
Polarised light rotate larger or smaller magnitude.Incident polarizer, liquid crystal layer 112 and outgoing plate 116 through incidence plate 114
The optical states of the liquid crystal layer segment that the light that outgoing polarization piece advances runs into according to the orientation and light of polarizer decay to difference
Degree.Display system 100 is provided using this behavior has can electronically controlling for different outward appearances in different zones
Display.
Lighting device 130 includes one or more light sources 132.Light source 132 can be linear cold cathode fluorescent lamp (CCFL).
However, it is possible to use the fluorescent lamp of other types of light source 132, such as other species, incandescent lamp, light emitting diode, You Jifa
Optical diode has been found that it is suitable any other light source.
Lighting device 130 can include rear reflector 134.Rear reflector 134 can be specular reflector, diffuse reflector or
The combination of specular reflector and diffuse reflector.One example of specular reflector is to be available from 3M companies
VikuitiTMEnhanced Specular Reflector(ESR)(VikuitiTMEnhanced specular reflector) film.Suitably
The example of diffuse reflector includes the polymer filled with diffusing reflection particle.Other examples of diffuse reflector include poromerics and contain
Filament material, such as in (such as) United States Patent (USP) No.6, discussed in 497,946 (Kretman et al.).Other unlisted classes herein
The reflector of type can be used for rear reflector 134.
Display system 100 can be described as " direct-lit ", light source 132 is arranged on the dead astern of LC panels 110.
In other embodiments, display may include side lighting illuminating apparatus (not shown), such as light guide with relevant source.It is logical
Often, during any suitable lighting device may be used to display of the invention.
The display system 100 of Fig. 1 is included in exemplary in the backlight 120 between lighting device 130 and LC panels 110
Optical element.Backlight 120 can include (for example) diffusion sheet 140.Diffusion sheet 140 can be any suitable diffuser or unrestrained
Penetrate plate.For example, diffusion sheet 140 may include any suitable diffuse material.In certain embodiments, diffusion sheet 140 can be included
The polymer substrate of polymethyl methacrylate (PMMA), it has including glass, polystyrene beads and CaCO3Particle it is many
Plant dispersed phase.Exemplary diffusion sheet may include to be available from 3635-30,3635-70 of 3M companies (St.Paul, Minnesota) and
3635-100 types 3MTM ScotchcalTM Diffuser Film(3MTM ScotchcalTMDiffuser).
Backlight 120 can also include that (for example) directed circulation utilizes film (DRF) 150, and it is also referred to as brightness enhancement layer or blast
Film.DRF 150 includes the surface texture that off-axis light is re-directed to the direction closer to display normal axle.This increases transmission
The light quantity of the propagating co-axial of LC panels 110, so as to increase the brightness and contrast of the image that beholder sees.It is shown in Fig. 1
Exemplary DRF 150 includes base part 152 and structured surface layer 154, is shown here as layers of prisms.Base part 152 and knot
Structure superficial layer 154 can be formed by different materials, or they can be made up of identical material, and they can one
Ground is formed as the different piece of single film.
One example of DRF is prismatic brightness enhancing layer, and there is multiple to reposition illumination light by reflecting and reflecting for it
Prism ridge.The example of the prismatic brightness enhancing layer that can be used in display system 100 includes VikuitiTMBEF II and BEF III
Series of prisms film (is available from 3M companies), including BEF II 90/24, BEF II 90/50, BEF IIIM 90/50 and BEF
IIIT。
Other DRF can be referred to as gain diffuser, and include being arranged on one or two first type surface of film or layer
The structure of rule or irregular matrix array, such as globule, dome, pyramid or other structures.One example of gain diffuser
To be available from the Opalus BS-702 of Keiwa Corp..Other gain diffusers are in United States Patent (USP) and patent disclosure No.2006/
0103777 (Ko et al.), No.7,320,538 (Ko et al.), No.7,220,026 (Ko et al.), No.7,416,309 (Ko etc.
People), have disclosed in No.2006/0250707 (Whitney et al.) and No.2007/0024994 (Whitney et al.).Gain
Diffusion sheet can be microreplicated structured surface layer, or they can be arranged on basalis table with (such as) by the way that globule is embedded in
Formed on face or in the binding agent of adjacent substrate layer surface.Globule can be by known to persons of ordinary skill in the art any
Suitable transparent material is made, such as organic material (such as polymer) or inorganic material.The average diameter of globule is generally in (example
In the range of such as) 5 μm to 50 μm, but the globule of other sizes also can be used.Can be of about following these examples with actionradius
The globule of property value or any value between it：2nd, 4,5,8,10,12.5,15,17.5,20,25,37.5,45,50,60,70 and 80
Micron.Generally, scattered binding agent is substantial transparent to globule wherein.In most of exemplary embodiments, binding agent
Material is polymeric material.According to desired use, binding agent can be ionizing radiation curable (such as UV curability) polymeric material
Material, thermoplastic, polymeric materials or adhesive material.A kind of exemplary UV curability binding agent can include carbamate third
Olefin(e) acid ester oligomer, is such as available from the Photomer of Cognis companiesTM6010.Globule, binding agent, refraction table surface layer etc.
Further describing can see (such as) U.S. Patent Publication No.2008/0049419 (Ma et al.).
In certain embodiments, display system 100 can include multiple same types or different types of directed circulation profit
Use film.
Display system 100 may also comprise light-redirecting film, such as turning film (not shown), its substantially not " circulation
Using " light but still play a part of increase along required axle towards beholder propagate light quantity.
Display system 100 can also include reflection type polarizer 160.The reflective polarizing of any suitable type can be used
Piece, such as multi-layer optical film (MOF) reflection type polarizer；Diffuse Reflective Polarizer film, for example continuously/disperse phase polarizers；Wiregrating is anti-
Emitting polarizer；Or cholesteric reflective polarizer.
Both MOF reflection type polarizers and continuous phase reflection type polarizer all rely at least two materials and (usually gather
Compound material) between refractive index difference optionally reflect a kind of light of polarization state, and transmit in orthogonal polarisation state
Light.Suitable MOF reflection type polarizers are in (such as) jointly owned United States Patent (USP) No.5,882,774 (Jonza et al.) and name
Referred to as " LOW LAYER COUNT REFLECTIVE POLARIZER WITH OPTIMIZED GAIN " (has optimized gain
Low layer number reflection type polarizer) (attorney 64121US002) U.S. Patent application No.61/040,910 in
Description.The example of commercially available MOF reflection type polarizers includes the Vikuiti with diffusing surfaceTMDBEF-D280 and DBEF-
D400 reflection multilayer type polarizers, both of which is available from 3M companies.
The example of the Diffuse Reflective Polarizer film that can be used in conjunction with the invention includes：Continuously/disperse phase reflective type polarizer, such as
Described in jointly owned United States Patent (USP) No.5,825,543 (Ouderkirk et al.)；With diffusing reflection multilayer polarizer, such as exist
Described in jointly owned United States Patent (USP) No.5,867,316 (Carlson et al.).The Diffuse Reflective Polarizer of other suitable types
Film is described in United States Patent (USP) No.5,751,388 (Larson).
Some examples for the wire grid polarizer that can be used in conjunction with the invention are included (such as) in United States Patent (USP) No.6,122,103
Those described in (Perkins et al.).Wire grid polarizer is available from (such as) Moxtek Inc. (Orem, Utah).
Some examples for the cholesteric polarizer that can be used in conjunction with the invention include (such as) in United States Patent (USP) No.5,793,
Those described in 456 (Broer et al.) and United States Patent (USP) No.6,917,399 (Pokorny et al.).Cholesteric polarizer
Generally provided together with quarter-wave retardation layer on the output side, so that being changed through the light of cholesteric polarizer transmission
It is linearly polarized photon.
Reflection type polarizer 160 can be self-supporting in display system 100, or it can be attached to other structures
On.In certain embodiments, reflection type polarizer 160 can be attached in the incidence plate 114 of LC panels 110.In other realities
Apply in example, reflection type polarizer 160 can be attached on diffusion sheet 140.
Display system 100 can include optical film 170.Optical film 170 can be orientation as discussed herein with (such as)
Recycle film, such as prismatic brightness film or gain diffuser.It can play a part of mechanical function, such as screening glass.
In certain embodiments, optical film 170 may include stretching polymer film as further described herein.Optical film 170 can be
Integration, or it can include multilayer.Generally, it can be included in display system 100 for any required purposes
Any suitable optical film.Optical film 170 can be self-supporting, or it can be attached other light within system 100
Learn on the one or both sides of film or optical layer.When reflection type polarizer 160 is present in system 100, optical film 170 can be by
It is laminated or be otherwise affixed on reflection type polarizer, to strengthen or improve the mechanical performance of reflection type polarizer.Individually
Reflection type polarizer 160 may (for example) lack the enough parts and/or dimensionally stable used in display system 100
Property, or it may be with relatively fragile property, this causes to be difficult to process in preparing, transporting and/or assembling.In such case
Under, optical film 170 can have mechanical performance so that when attaching it on reflection type polarizer 160, the combination is in machinery
Aspect consolidates to significantly improve the availability of reflection type polarizer enough.
When optical film 170 is arranged on into (such as) reflection type polarizer 160 and the incidence plate 114 of LC panels 110 is attached to
In incident polarizer between when, we can be referred to as optical film (IPOF) between polarizer.Generally, can be inclined by reflection-type
Shake piece 160 and incident polarizer is considered as LC layers 112 of display system 100 of modulation and " adjustment " or prepares from backlight
Light.Once reflection type polarizer 160 transmits light from the preceding optical element of backlight 120 towards LC panels, with any non-pre-
The polarization state that the mode of phase changes light is generally all worthless.May influence or may not shadow as the optical film 170 of IPOF
Sound continues to the polarization state of the light of incident polarizer from reflection type polarizer 160, reaches the influence outward appearance of display system 100
Degree, this depends greatly on its birefringence property.
In addition to the example of the optical film 170 between reflection type polarizer 160 and LC panels 110 from Fig. 1, also
It is contemplated that other scenes optical film being arranged between polarizer, and the discussion with regard to IPOF is also generally suitable for use in that herein
A little situations.The optical film that will can also be located between the polarized lighting device and follow-up polarizer for producing polarised light is considered as IPOF,
And optical film of the invention can provide beneficial effect for such construction.Polarized lighting device is in (such as) PCT Publication WO
May be described in 2006/126128 (Boonekamp et al.) and WO 2004/003631 (Benoit et al.).Additionally, such as
Fruit is it is contemplated that between reflection type polarizer 160 and rear reflector 134 (including both) be to constitute the polarization illumination to fill
The all element showns put, then Fig. 1 can be considered as and show polarized lighting device and polarizer (with reference in incidence plate 114
Incident polarizer) between optical film 170.
Generally, avoided using high birefringence material between polarizer in the display.In the big portion that these are applied
In point, these birefringent films can make light depolarize, introduce the artificially coloring vestige of excess or produce both of these case.To this
Most general exception is that strong diffusion sheet is also used for birefringent film construction to hide the situation of the color for producing, and for small
, the length of delay of strict control and be intended to change transmission polarization state compensation film situation.Except producing bad color effect
Fruit is outer, birefringent film also result in recycle backlight luminance gain it is relatively low.
For polymeric optical films, birefringence is generally mainly by the inwardness and the mode for preparing film of polymeric material
It is caused.Polymer film is generally stretched prior during preparation, and the orientation (and molecule that therefore it is included) of film can be strong
The birefringence of ground influence film.In preparation, film can be stretched or is oriented either uniaxially or biaxially.
In general, compared with the film for being stretched with the film of uniaxial tension or with slightly underbalance double-shaft way, in both direction
The axle that tends in membrane plane of the biaxially-stretched film that is balanced of stretch range between display there is less birefringence.Fig. 2
It is the schematic diagram of optical film, shows the orientation of the refractive index in anisotropic film.nxAnd nyIt is along the orthogonal x faces of film
The refractive index of interior axle and y faces interior axle, and nzIt is the refractive index of outside face z directions (being orthogonal to x directions and y directions).In the present invention
In, we will under many circumstances use coordinate system, and wherein x directions are the maximum tension directions of film.
When PET film is arranged between the polarizer of intersection or parallel polarizer and is seen with being greater than about 40 degree of incidence angle
When examining, it is observed that generally refractive index is of about nx=1.68, ny=1.64 and nzThe PET film of=1.49 biaxial orientation is produced
The coloury outward appearance of life.Even if minimum heart aligns the optic axis of PET film with the axle of polarizer, this still can be observed
Color.Additionally it was found that, when carefully the axle of PET film aligns with the axle of polarizer, stretching more balances (i.e. nx≈ny)
PET film even can more be rich in color under the incidence angle less than 30 degree.In view of such as these reasons, generally assuming that should not be anti-
Using the film layer of high birefringence between emitting polarizer and another polarizer, unless it is that have and produce polarization by reflection work(
Can reflection type polarizer itself in polymer film the almost identical property of microbedding and the thin layer of axle alignment.Referring to (such as)
United States Patent (USP) No.5,882,774 (Jonza et al.).
In general, when when observing light after a pair of polarizers and birefringence IPOF, it can be seen that color fringe.Pass through
The path through IPOF that the retardation that the particular light ray of this optical element combination is experienced will be taken depending on light.Retardation
The polarization state of the different spectral components of light is changed into different degree, so as to cause through the second polarizer according to wavelength
Transmission changes.The schematic diagram of this universal phenomenon under specific physical conditions is being described during Michel-Levy color table.Color
Dissipate also related to these wavelength dependency effects.
nzValue is smaller than nxAnd nyOr more than nxAnd ny(wherein nxAnd nyRefractive index and minimal face infolding respectively in largest face
Penetrate rate) twin shaft birefringent polymer film in atmosphere with film retardation be zero two incidence angles (along the incidence of x-axis
± θ in planesa).For all other θ directions put away from these andDirection is (whereinRepresent the orientation from point
Angular displacement, i.e., relative to the rotation of z-axis), retardation increases.For many films, can be used wide-angle lens (conoscope) or
Suitable angle detects by an unaided eye by the diffused light source of two polarizers and birefringence IPOF to observe the two zero points and have
Color postpones the concentric circles of striped.The low latency value and moderate delay value of a kind of to several wavelength can produce very dense color,
And due to transmitted light depend on wavelength quick oscillation, high retardation value (>~5 λ) produce subdued colour.
This effect, the conoscopic figure of such as Fig. 3 can be understood by means of conoscopic figure.Fig. 3 is the transmission film stack for calculating
Transmitted intensity figure line, this film stack includes biaxial stretch-formed PET between parallel absorption-type polarizer and polarizer
Film, the wherein thickness of this medelling film are 125 microns and refractive index is nx=1.675, ny=1.641, nz=1.4906.Partially
The thang-kng axle of piece of shaking aligns with x-axis, and x-axis is slow (high index of refraction) axle of PET.The axle of figure line is the elevation angle (θa, annular concentric
Circle) and azimuth (Around round)；In the conoscopic figure, each point on figure represents visual angle.It is 600nm with regard to this wavelength
Incident light and for the figure that calculates, retardation is zero incidence angle (it is herein referred to as " refractive index symmetric points ")
Positioned at about θsaAt=± 41 degree of point of the center left side with right side along x-axis.High-visible in this figure is the highly transmissive of light
With the alternate concentric circles of low transmission, they keep placed in the middle around these symmetric points.Length of delay is with the distance with these symmetric points
Increase.(bright to bright or dark to dark) represents a wavelength difference in postponing for example, adjacent ring.
The figure line of Fig. 3 is to be calculated for the monochromatic light of 600nm.At other wavelength, the half of bright ring and Crape ring pattern
Footpath will change proportionally with wavelength.For the wavelength (such as white light) in successive range, transmission will reflect in the range of this
The combination transmission of all wavelengths；There is the maximum and minimum value of its transmission due to different spectral components at different positions,
Result will produce coloured pattern.Under the background in display backlight source, the coloured pattern may make us height dislike.Coloured pattern
Characteristic more significantly at the symmetric points.For from the farther viewing angle of symmetric points, the transmission of composition spectral components is strong
Degree pattern can quickly change with the minor alteration of viewing angle, and can cause more subdued colour pattern.
From the research of this figure line of birefringence characteristic film within the specific limits, together with to the reality between polarizer
The observation of border film, the design for having less colored IPOF of two standards significantly for being used in display backlight source.One standard is
Two symmetric points are not ordinarily visible in the visual angle of display or the cone.There is provided herein description depending on the symmetrical of film refractive index
The formula of point position.Note, the position of symmetric points is unrelated with film thickness.Second standard is that the retardation of film should be sufficiently high, with
Qualified color is assigned in the visual angle of display or the cone.Second standard can be by using the film of thick, high birefringence
And realize, because retardation can increase with film thickness.Thicker film can also provide further advantage, the mechanicalness for such as improving
Energy.
It was noticed that the first standard (i.e. symmetric points are not ordinarily visible in the cone of display) is used in the cone
Realize the necessary condition of high latency amount but be not adequate condition.Because birefringence is zero along symmetric points direction, therefore no matter
How is the thickness of film, and retardation will be always zero along these directions.However, birefringence and retardation deviate from symmetrically with visual angle
Put and increase, the value of the latter is also proportional to film thickness.
Symmetric points correspond to the pass the light that birefringent film is propagated along the direction that experience birefringence is zero.This can be tied
Close Fig. 2 to recognize, this schematically represents anisotropic film.Generally, the folding of any light experience propagated through this film
Rate is penetrated for nx、nyAnd nz.However, being orthogonal to the direction of propagation vibration of light due to electric field, therefore it is being orthogonal to the light direction of propagation
Plane in refractive index it is especially important.Notice is restricted to incidence angle θf(subscript " f " represents film, and " a " is represented in sky
Angle in gas) in x-z-plane in film propagate light, can solve by enter two orthogonal s polarized components and p-polarization
The dependent index of refraction n that the light of component is experiencedyAnd nθf。nθfIt is to be experienced by the p-polarization component of the electromagnetic wave of light in x-z-plane
Refractive index, and combine nxAnd nzCombined influence.It can be calculated by formula 1：
Work as nyAnd nθfWhen equal, light along the propagated that birefringence is zero, i.e., along the side corresponding to symmetric points
To propagation.Known refractive index, can be from the derived expressions of formula 1 finding θsf(subscript " s " represents symmetric points)：
θsfIt is the angle along the light of the propagated that birefringence is zero in film.When following condition is met,
In x-z-plane, with relative to air-membrane interface (x-y plane) into θsaThe light that the incidence angle at angle is propagated in atmosphere will be with θsf
Angle is refracted in film：
For some nx、ny、nzRefractive index collection, formula 2 there may be for θsfSolution, but formula 3 not be directed to θsa's
Solution.This corresponds to the direction of propagation in film, it is impossible to enter the film by from air refraction to film.In other words, in film
In with θsfThe light of propagation will experience total internal reflection at film-Air Interface.In such a case, it is possible to the light is referred to as into sky
Light of the incidence angle more than 90 degree in gas.The film of the symmetric points with the incidence angle in air more than 90 degree will generally meet this
The first standard for less colored IPOF that text is proposed, i.e. symmetric points are invisible in the cone of display because symmetric points from
It is sightless in air.Film with the symmetric points less than 90 degree can still meet the first standard, because many displays should
With the quite narrower cone of needs.In certain embodiments, it is 60 that IPOF goes for the aerial incidence angle of symmetric points
Degree, 70 degree, 80 degree, 90 degree or the application more than 90 degree.
When being used between polarizer, one embodiment of less colored stretching polymer film can be provided by meeting
The refractive index collection of following standard is characterized：(i)nx>ny>nz, (ii) nz<~1.52 and (iii) nx–ny>=~0.06.This kind of film
Can be prepared so that substantially uniaxial manner stretches PET by (such as).
The advantage of optical film is visualized between in order to help to make polarizer of the invention, and Fig. 4 (can compare with Fig. 3) is meter
The transmitted light intensity of the PET film of the transmission aligned adsorbent type polarizer of calculation and the substantially uniaxial orientation (stretching) between polarizer
The figure line of degree, the wherein thickness of this medelling film are 125 microns and refractive index is nx=1.6801, ny=1.5838, nz=
1.5130.For these refractive indexes, symmetric points are located at the incidence angle θ in airsaBe more than 90 degree at, this is by symmetric points in figure line
In sightless true reflection.
(i.e. retardation is sufficiently high to be assigned with the visual angle of display or the cone to return to the second standard on less colored IPOF
Give qualified color), it was noted that we generally observe subdued colour in length of delay film high.For some use
On the way, the minimum delay in using field should be at least about 5 wavelength, i.e. the edge of visual field should be at least far from symmetric points
About 5 delay stripeds.In the case where being also found that color change is offensive, diffusion sheet can be added to shelter color.Can
Retardation is measured with by being available from the polarimeter of (such as) Axometrics, Inc..In certain embodiments, for of interest
The cone in length of delay be more than 3000nm, 4000nm, 5000nm, 6000nm, 7000nm, 8000nm, 9000nm, 10000nm
Or film higher, it was observed that qualified color.Wherein retardation should can include that more than the cone of interest of these values
It is a little to cover the regarding with all optical paths incident in 40 degree, 50 degree, 60 degree, 70 degree, 80 degree or an angle of 90 degrees relative to main view axle
Cone.
It is two-fold we consider 5 kinds for the relation between the deep qualification for understanding length of delay and using as IPOF
Penetrate film.Two kinds in film are formed by PET, and two kinds are formed by syndiotactic polystyrene (sPS), a kind of (being labeled as tentering PC) generation
Table makrolon sample film, but possibly cannot obtain these accurate refractive indexes with real PC.PET and sPS films represent reality
Physical samples.Measure the refractive index of these films and calculate the delay of incident light in x-z-plane.In order to clear in following comparing
Then all length of delays are corrected to the film that thickness is 125 microns by Chu Qijian.
Refractive indexes of the Table I for the measurement of various films
The delay depending on the incidence angle in x-z-plane is calculated for the film with these refractive indexes, is depicted in Figure 5
As a result." twin shaft PET " is orientated using general order masking production line in the commodity production of PET film.This orientation
Usual non complete symmetry.Term " tentering film " refer to it is main only in one direction stretching and orthogonal dimensions be then limited to it is constant
The film of size, this is the situation occurred in standard film stenter when not using machine-direction oriented.Tentering sPS shows have
Close to the refractive index of true uniaxial film.This is caused by the crystal symmetry of sPS.
Note the larger difference (curve 500 and curve 502 of Fig. 5) between the length of delay of both PET films.Biaxial orientation
Retardation (curve 502) aerial incidence angle of PET be for about to intersect with zero line at 45 degree.Observed when using conoscope
When, the sample (125 microns of thickness) display has highly colored striped, and it forms approximate circle around zero-lag point.Observation tool
There are 50 microns of thick films of similar refraction rate, it is found that it has zero-lag point in identical position, but display has interval much broader
Striped.5th striped of latter sample extends nearly to the center (normal incident angle) of view.
Main (tentering) PET film in crossweb direction stretching shows the striped with tight spacing, but the center of curvature is just
Outside conoscope visual angle.Curve 500 shows that these symmetric points cannot be observed in atmosphere, is only displayed at 90 degree of incidence angles
About the 6th striped.
Although possibly cannot obtain these accurate refractive indexes using PC, curve 504 is listed with makrolon (PC).Purport
There is the low class film of the birefringence of zero-lag point outside expression in atmosphere 90 degree, but it is displayed that with birefringence
A low class film medium to birefringence.Even if be coated using diffusion coating, the color observed on these films
May be offensive, because these films show that the minimum strength modulation with the wide scope depending on wavelength is adjusted with maximum intensity
System.
Use the refractive index calculated curve measured on the biaxially-stretched film of sPS and restricted uniaxial tension (tentering) film
506 and curve 508.The thickness of film is of about 50 microns, and the calculating of retardation curve assumes that film thickness is 125 microns.
The bright striped of coloring is observed on 50 microns of biaxial stretch-formed sPS films of thickness.By curve 506, it is evident that at 45 degree
Low order striped is observed, for 50 microns of films of thickness.Predict tentering film in all incidence angles by curve 508
Place all has high rank striped.On 50 microns of tentering sPS films of thickness, light face is only observed at nearly 75 degree of incidence angles
Color.125 microns of films of the same type of thickness should show with it is less, may tend to without observable color.
Can be reasoned out from Fig. 3, depending on wavelength Strength Changes and (therefore) color may depend on and incidence angle and enter
Penetrate both planes (azimuth).The object of the curve 502 in Fig. 5 is returned to, alongDegree azimuth is directed to three incidence angles
(0 degree, 30 degree, 60 degree) is transmitted to twin shaft PET and modeled.The figure line of Fig. 6 shows, in this case, transmitted intensity change with
Incidence angle and increase.Because minimum is substantially reduced close to zero transmission value, therefore mean intensity at multiple wavelength at 60 degree.
For the same reason, the tinctorial strength for coming direction since then may be high, even if it is produced by high-order striped.Suitable diffusing surface
Coating can hide this color, but intensity will be relatively low.Generally speaking, what this bad optic response caused to substantially reduce is average
Penetrate value and obvious tinctorial strength.
At the viewing angle closer to zero-lag point, the display from low order postpones striped of twin shaft PET film has denseer face
Color.In the figure 7 such case is shown for the plane of incidence at 5 degree of azimuths.47 degree of incidence angles in the plane are non-
Very close to zero-lag point, it is at about 47 degree of incidence angles and 0 degree of azimuth.In noticing that feux rouges (i.e. at about 660nm) is transmitted
Minimum value wide.All it is difficult to shelter this color with any diffusion coating.The average transmittance of 47 degree of incidence angles only has 12%.
By contrast, the main PET film (curve 500 of Fig. 5) being only orientated in transverse direction or tentering direction can be provided and significantly changed
Kind optical property.Such film can also be described as (SUO) film of substantially uniaxial orientation.Shown in Fig. 8 at 20 degree of azimuths
The intensity in transmission curve of the calculating of the plane of incidence at place represents the very subdued colour for being all difficult to observe in any condition.This
Outward, the color under any other group of viewing angle without any difference.However, available film is not limited to only carry out the feelings of tentering
Condition.Larger θoValue and larger retardation can be obtained using the film of various asymmetric orientations.
The film of substantially uniaxial orientation of the invention can serve as a part for any suitable optical film known in the art.
It can be processed with any compatible technique known in the art.For example, can process its surface assigns mist degree with to film.
Other materials can be set in its surface so as to obtain optical function, mechanical function, electric function or other functions.
Substantially the film of uniaxial orientation can be used with another optical film in lamilate, to strengthen another optical film
Mechanical performance.For example, substantially the film of uniaxial orientation can be laminated on the one or both sides of reflection type polarizer, with display
Mechanical stability, disposal ability, and/or the robustness of reflection type polarizer are improved in device application.
The film of substantially uniaxial orientation can serve as with elongated prism, gain diffuser or any other appropriate surfaces knot
The directed circulation of structure utilizes the substrate of film.For example, schematic cross sectional views of the Fig. 9 for one embodiment of film stack 980, film
Stacking 980 includes optical film 970 and reflection type polarizer 960.In certain embodiments, optical film 970 may include stretching polymerization
Thing film substrate 972 and optical layer 974.Additionally, in certain embodiments, stretching polymer film 972 may include substantially uniaxial orientation
Film.Generally, the film 970 and film 960 of Fig. 9 can be used in the display system as the display system 100 of Fig. 1, and combine Fig. 1
The modification of described optical film may also be included in that in the film 960 and film 970 of Fig. 9.
As schematically shown in fig .9, film 970 may be adapted to be used in reflection type polarizer 960 and the incidence of LC panels is inclined
Shake between piece (not shown).Reflection type polarizer 960 can be self-supporting, or it can be attached to another backlight knot
On structure, such as on diffuser plate.Due to depolarizing and undesirable colour effect problem as discussed herein, between polarizer
Generally the directed circulation with birefringence substrate has not been used to utilize film.
As disclosed herein, substantially the film of uniaxial orientation can be used between polarizer and have qualified result.Will
Undesirable optical effect is minimized, fast axle or slow axis can be made to be alignd with the extinction axis of polarizer and be taken to these films
To.Alignment need not be accurate, but in general, the possibility of undesirable optical effect can be reduced closer to alignment.One
In a little embodiments, angle between the fast axle of the film of substantially uniaxial orientation and the thang-kng axle of polarizer can for 10 degree or smaller,
Or be 5 degree or smaller.In some embodiments, it may be desirable to, by the tensile axis of the film of substantially uniaxial orientation (such as this paper often
X-axis) with the extinction axis of polarizer snap to 10 degree it is interior or smaller or 5 degree in or it is smaller.In the alignment, no matter in sky
It is whether visible in gas, all along the intensity transmitted by polarizer most weak direction, symmetric points are set.The orientation is shown in Figure 10.
Stretching polymer film 972 can be any suitable stretching polymer film as herein described, such as stretch poly- terephthaldehyde
Sour glycol ester (PET) film, makrolon (PC) film, polypropylene screen, syndiotactic polystyrene film or any other suitable
Polymeric material film.Optical film 974 may include any suitable layer, such as anti-reflecting layer, antistatic backing, mist degree coating, smooth painting
Layer, anti-scratch coating or any compatibility layer or coating described in United States Patent (USP) No.6,368,699 (Gilbert et al.).
In some embodiments, optical layer 974 may include multiple optical elements 976.In certain embodiments, optical element 976 includes folding
Emitting optical element.Any suitable optical element can be used, such as elongated prism, globule, lenslet, pyramid, solid angle, diffraction
Structure or enhanced diffusion chip architecture.One or two first type surface that can be by optical layer 974 adjacent to stretching polymer film 972 is set.
In the illustrated embodiment, optical layer 974 is set near stretching polymer film 972 so that stretching polymer film is located at optical layer
Between 974 and reflection type polarizer 960.Optical layer 974 can be arranged on one or two first type surface of stretching polymer film；
Or, optical layer 974 can be arranged on support layer.Any suitable technology can be used to form optical layer 974, such as following
Technology described in jointly owned U.S. Patent application：No.61/039637, entitled " Methods of Slide
Coating Fluids Containing Oligomers " (slope flow coat cloth contains the method for the fluid of oligomer) (Yapel etc.
People)；No.61/039649, entitled " Methods of Slide Coating Two or More Fluids " (slope flow coat cloth
The method of two or more fluids) (Yapel et al.)；And No.61/039653, entitled " Methods of Slide
The Coating Two or More Fluids " method of two or more fluids (slope flow coat cloth) (Yapel et al.).
In fig .9, film 960 and film 970 are shown as the film being physically separate from.Generally, if applicable, backlight can be attached
The component for stacking.When the multiple films of attachment, it may be considered that combinations thereof, to constitute multifunctional membrane.Figure 11 is to combine stretching
The schematic cross sectional views of the exemplary multifunctional membrane 1100 of polymer film.Multifunctional membrane 1100 includes reflection type polarizer 1110,
For example, (having at entitled " LOW LAYER COUNT REFLECTIVE POLARIZER WITH OPTIMIZED GAIN "
The low layer number reflection type polarizer of optimized gain) U.S. Patent application No.61/040,910 (attorney dockets
No.64121US002 the multi-layer optical film reflection type polarizer disclosed in).Reflective polarizer 1110 can be used viscous on side
Mixture layer 1125 is attached or is laminated on stretching polymer film 1120.Stretching polymer film 1120 can include being located at and reflection-type
Any suitable optical layer (such as mist degree coating) on the relative first type surface of polarizer 1110.In the another of reflection type polarizer 1110
On side, useful binders layer 1135 is attached or laminated another stretching polymer film 1130.Stretching polymer film 1120,1130
Any suitable film as herein described is may include, such as the film of substantially uniaxial orientation.
Film 1100 also includes optical layer 1140, and it is arranged on the stretching polymer film relative with reflection type polarizer 1110
On 1130.Optical layer 1140 may include any suitable optical layer, such as herein in conjunction with Fig. 9 optical layer 974, Fig. 1 layer 154,
Or those layers described in the layer being arranged on film 170 or near it of Fig. 1.
In multifunctional membrane 1100, the tensile axis of stretching polymer film 1120 and stretching polymer film 1130 can be with reflection-type
The resistance optical axis alignment of polarizer 1110.Stretching polymer film 1120,1130 can provide mechanical stability to reflection type polarizer, and
And generally good hardness, flatness, treatment robustness can be provided, and after environmental aging required property durability.
Prime coat or coating can be coated on stretching polymer film of the invention, it can be formed by polyester, to change
It is apt to the bonding force and multi-layer optical film reflection type polarizer between in stretching polymer film and other layers or film (such as optical layer).
The example that can be used to prepare the material of prime coat includes polyacrylate, sulfonated polyester, halogenated polymer (such as poly- (inclined dichloro
Ethene)), poly- (vinyl acetate), polyurethane and epoxy resin.In these materials, preferred material category includes polypropylene
Acid ester copolymer and sulfonation and copolymerization ester.Can be using prime coat as organic solvent solution or the aqueous solution or dispersion solution delivering
Onto web.Prime coat can be delivered in web before or after the stretching, be such as filed in being total to on July 23rd, 2007
Described in the U.S. Patent Publication No.2009/0029129 (Pellerite et al.) for transferring the possession of.
Available acrylate copolymer is included in United States Patent (USP) No.4,098,952 (Kelly et al.) and No.6,893,
Those described in 731 (Kausch), and methyl methacrylate and ethyl acrylate are with optional functional monomer (for example
Acrylic acid, hydroxyethyl methacrylate and N hydroxymethyl acrylamide) copolymer.Particularly preferred can be trade name
RHOPLEX 3208 and RHOPLEX GL618 is from Rohm and Haas commercially available latex dispersion.
Available sulfonation and copolymerization ester is included in United States Patent (USP) No.5,391,429 (Otani et al.), No.5,427,835
(Morrison et al.), No.6,893,731 (Kausch) and in commonly assigned entitled " Primer Layer for
U.S. Patent application No.61/040737 (the generations of Multilayer Optical Film " (for the prime coat of multi-layer optical film)
Reason people file number 64157US002) described in those.These copolyesters pass through glycol (such as ethylene glycol, diethylene glycol (DEG), new penta 2
Alcohol and poly- (caprolactone) glycol) and terephthalic acid (TPA), M-phthalic acid, M-phthalic acid and 5- sulfoisophthalic acid sodium salts
Mixture condensation is made.
Can also be by adding crosslinking agent (including melamine resin, aziridine, isocyanates and epoxy resin)
Coating is crosslinked.Suitable crosslinking agent is discussed in United States Patent (USP) No.6,893,731 (Kausch).For based on polypropylene
For the primer coating of acid esters, melamine resin (such as CYMEL 327 (Cytec Industries)) be it is preferred,
And for the primer coating based on sulfonation and copolymerization ester, melamine resin and aziridine (such as NEOCRYL CX-
100 (DSM)) it is preferred crosslinking agent.In terms of the weight of adhesive solids, the typical content of crosslinking agent is 10-50 weight %.
Primer coating can include other optional additives to improve machinability or increase other functions to coating.This
Class additive includes：Surfactant, preferably nonionic surface active agent, to strengthen profit of the coating media in substrate
It is moist；Curing catalysts, such as p-methyl benzenesulfonic acid and its ammonium salt；Slip agent, such as a diameter of 0.4-5 microns polymer is small
Pearl, to promote the formation of volume when film is processed into big volume；PH controlling agents, such as dimethylethanolamine and other volatile amines；
And antistatic additive.The latter includes：Conducting polymer, such as in United States Patent (USP) No.7, described in 041,365 (Kausch et al.)
Polyglycolic acid fibre poly styrene sulfonate；Conducting nanoparticles, such as in United States Patent (USP) No.5,427,835 (Morrison
Et al.) described in antimony-doped stannic oxide and vanadium oxide；High aspect ratio material, such as in U.S. Patent Publication 2007/
CNT described in 0231561A1 (Pellerite et al.)；The lithium salts of ionic material, such as strong acid, such as lithium bromide,
Lithium nitrate, nine fluoro- 1- butane Sulfonic Lithiums and double (trifluoro methylsulfonimide) lithiums；Ionic material, such as monomeric quaternary ammonium salt are (for example
CYASTAT 609)；And the acrylate copolymer with pendency ammonium center is (such as in commonly assigned United States Patent (USP) public affairs
The copolymer of the 2- acrylyl oxy-ethyl-trimethyl salmiacs described in cloth No.2009/0029129 (Pellerite et al.)).
The example of available primer coating includes RHOPLEX 3208 and CYMEL 327, and sulfonated polyester and CYMEL
327.Nonionic surface active agent can be used as wetting agent, such as TOMADOL 25-9, and generally by it with 0.01-
The content of 0.1 weight % is added in dispersion.The preferred catalyst used in these systems is p-methyl benzenesulfonic acid diisopropanolamine (DIPA)
(diisopropanolammmonium p-toluenesulfonate), it can be commercially available with CYCAT 4045.With total solid
Meter, the typically used as content of this catalyst is 0.1-5 weight %, if condition of cure is related to low temperature, is needed using higher
Content.Prime coat can have about 6 microns to 25 microns of wet-film thickness, and preceding with stretching with about 0.25 micron after the drying
To 10 microns of thickness.
For the PET film (as disclosed herein) of substantially uniaxial orientation to be attached into multi-layer optical film, (for example reflection-type is inclined
Shake piece) on appropriate resin co-owning and Co-pending U.S. Patent Application No.61/041092 " ADHESIVE
LAYER FOR MULTILAYER OPTICAL FILM " (for the adhesive phase of multi-layer optical film) (Jones et al.) (agency
People file number 64212US002) in be described.Also any other adhesive known in the art or attachment method can be used.
Example
Example 1
In one embodiment of the invention, it is prepared by the following method the PET film of substantially uniaxial orientation：(1) about
Under the speed of 42.7m/min, the intrinsic viscosity for extruding about 1,680kg/h is of about 0.6 polyethylene terephthalate
Resin, to prepare thickness as the casting web of 0.64mm, (2) preheat casting web at 70 DEG C, then with about 1.17 times of originals
Beginning and end stretched dimension slightly stretches casting web on length direction or longitudinal direction (MD), and (3) preheat and horizontal in web at 95 DEG C
To or tentering direction (TD) on web is stretched into about 4 times, (4) heat setting web at 155 DEG C, and (5) are in tentering direction
On loosen this web 2.5%.Can with large scale (3,000mm is wide) prepare thickness as 0.127mm, uniaxial orientation, with excellent
Horizontal and web longitudinal thickness uniformity the PET film of different web.Longitudinal stretching ratio in the range of 1.05 times to 1.30 times is can
Capable, wherein the lower limit of the scope is determined by machinability requirement (segmentation of film), and the upper limit of the scope is then by application performance
It is required that (maintenance of polarization axle alignment) determines.The film is assessed to determine the retraction after 85 degrees Celsius of environment 15 minutes is undergone
Amount.Both and various location over the entire width in the Main way (MD and TD) of the film for preparing determine retraction
Amount.These values are varied from whole web, film center measure the value in MD directions be 0.40%, in TD directions
Be worth is 0.01%.The value measured at a distance from the edge 750mm of film is respectively：It is 0.34%, is in TD directions in MD direction
0.00%；It is 0.41%, is 0.01% in TD directions in MD direction.
Example 2
In one embodiment of the invention, it is prepared by the following method the PET film of substantially uniaxial orientation：(1) about
Under the speed of 42.7m/min, the intrinsic viscosity for extruding about 1,680kg/h is of about 0.6 polyethylene terephthalate
Resin, to prepare thickness as the casting web of 0.64mm, (2) preheat casting web at 70 DEG C, then with about 1.17 times of originals
Beginning and end stretched dimension slightly stretches casting web on length direction or longitudinal direction (MD), and (3) preheat and horizontal in web at 95 DEG C
To or tentering direction (TD) on stretch about 4 times of the web, (4) heat setting web at 155 DEG C, (5) loosen width in tentering direction
Material 2.5%, and (6) continuously loosen film using the online baking oven (being set in 110 DEG C) after stenter, bear web extremely low
Tension force with further reduce film web longitudinal direction amount of recovery.Can with large scale (3,000mm is wide) prepare thickness and be
0.127mm, uniaxial orientation, the PET film with excellent web transverse direction and web longitudinal thickness uniformity.At 1.05 times to 1.30
Than being feasible, wherein the lower limit of the scope is determined longitudinal stretching in the range of times by machinability requirement (segmentation of film), and
The upper limit of the scope is then determined by application performance requirement (maintenance that polarization axle aligns).Model of the tentering direction draw ratio at 3 to 7 times
It is applicable in enclosing.Heat setting temperature can be remained sufficiently high to improve crystallinity but sufficiently low again, to avoid pair to add
Work and film fragility or segmentation property produce adverse effect, or avoid web from adhering on tentering clip.Suitable heat setting temperature is
Usually less than about 170 DEG C.Oven temperature after stenter is feasible, the wherein temperature range in the range of 100 DEG C to 140 DEG C
Lower limit determine that and the upper limit of the temperature range is then by low by the requirement to the dimensional stability of film in the application of product
Undesirable film deformation determines in web transverse direction during being loosened under power.
The film is assessed to determine the amount of recovery after 85 degrees Celsius of environment 15 minutes is undergone.In the main side of the film for preparing
Amount of recovery is determined to both and the various location over the entire width in (MD and TD).These values base in whole web
This is constant, and when oven temperature of the baking oven after stenter using 110 DEG C, the value in MD directions of measurement is 0.05%,
The value in TD directions is 0.01%.When oven temperature of the baking oven after stenter using 130 DEG C, the amount of recovery of measurement is in MD directions
It is 0.00% for 0.02%, in TD directions.The film of gained shows (right with preferable optical property and preferable thermal coefficient of expansion
In MD and TD, respectively 58ppm/ DEG C and 1ppm/ DEG C) and retraction property.The film of gained is under 85 DEG C of maximum operation (service) temperature
With excellent dimensional stability.
Compared with other films (such as the PET or polycarbonate membrane of biaxial orientation), the tentering PET film of example 2 is in orientation
Main way (TD) display has high rigidity.Figure 12 shows the biaxial orientation PET film and polycarbonate membrane phase with traditional mode of production
Than the Moduli data of tentering PET.Curve 1210 corresponds to tentering PET (TD), and curve 1220 corresponds to tentering PET (MD), curve
1230 correspond to twin shaft PET (TD), and curve 1240 corresponds to twin shaft PET (MD), and curve 1250 corresponds to makrolon (MD).
Technology according to ASTM D4065 obtains these data using dynamic mechanical analysis.Using TA Instruments,
Inc. Dynamic Mechanical Analyzer, Model Q800 (Q800 types Dynamic Mechanical Analyzer) is tested.Make
Pressed from both sides with film and test all samples under tension.Sample is heated with 2 DEG C/min of speed.Frequency of oscillation is 1Hz, amplitude of oscillation
It is 0.1%.Sample bandpass is 6mm, length is 15.5mm.
The film as such as example 2 is used as and thin (0.032mm -0.094mm) the reflection type polarizer film as core
During the laminated base of (such as being available from the DBEF of 3M companies), the film can strengthen the part stability of lamilate in the display
(tendency of bending).UV curing adhesives are used between each in layer, the PET film of example 2 is laminated to reflection-type
On every side of polarizer membrane.In U.S. Patent application No.61/041092 " ADHESIVE LAYER FOR MULTILAYER
In OPTICAL FILM " (for the adhesive phase of multi-layer optical film) (Jones et al.) (attorney 64212US002)
Describe UV curing adhesives.Before laminated, using the coating formula being made up of following part by PET film bottoming：It is dissolved in
RHOPLEX 3208 (Rohm and Haas Co.) solid, the CYMEL of about 0.6 weight % of about 6 weight % in ionized water
327 (Cytec Industries Inc.) solids, the CYCAT 4045 (Cytec Industries Inc.) of about 0.1 weight %
Solid, and about 0.1 weight % TOMADOL 25-9 (Tomah Chemical Co.).Order by merging is as follows：Water, surface are lived
Property agent, binding agent, crosslinking agent, catalyst.The mixture is coated in polyester base with 6 microns of wet-film thickness.Then will
Film passes through 65 DEG C of baking oven, to obtain about 0.4 micron of thickness of dry film.Laminated PET film and reflection type polarizer film so that PET
Substantially alignd with the MD directions of reflection type polarizer film in the MD directions of film.Lamilate is used for liquid crystal display television (LCD-
TV), the TD directions of substrate are made vertically aligned.
Lamilate is during and after temperature and temperature cycles (such as the phenomenon what is observed in LCD-TV)
Must remain dimensionally-stable.When the laminated part of large scale is prepared, in long-time after high temperature or when being followed exposed to temperature
During ring, component tolerance must be essentially maintained.
For the lamilate of the film preparation with example 1 and example 2, the side of the dimensional stability in observation lamilate is used
Method.The step of each lamilate is followed be：Two blocks of double strength glasses of 24.1cm × 31.8cm are cleaned with isopropanol, to remove
Any dust.The laminate film of one 22.9cm × 30.5cm is attached to one in one piece of the two of glass short sides and side long
On, make remaining side long unrestricted.Use 3MTMBe attached to for laminate film by double coated adhesive tape 9690 (3M (St.Paul, MN))
On glass so that three edge 1.3cm of the glass that adhesive tape distance is covered by three sides of laminate film are remote.Laminate film is attached to glue
Take, so that laminate film is fixed to the top of glass surface by the thickness (about 0.14mm) of adhesive tape.Use the roller of 2kg weights
Lamilate is adhered on adhesive tape, roller is rolled across the every side of adhesive tape in each direction once.Then by same thickness and
The 1.3cm PET film pads wide of length are set onto the opposite side of lamilate, and placed in the middle above adhesive tape.Second block of glass is set
Put at the top of pad, and with following glass Accurate align.Thus obtained the glass-tape-laminate film of sandwich sample-
Shim-glass test module, wherein laminate film being limited three edges and substantially can freely be floated at center.Make
With four binder (the Binder Clips (binder), Officemate for being commonly used to fix a repeated paper
International Corporation (Edison, NJ)) module is linked together.Binder should have suitable chi
It is very little, apply pressure with to the adhesive tape center apart from glass edge about 1.9cm.Each setting two on the short side of module by binder
Individual, each distance is clipped in the top edge about 1.9cm of the laminate film between the glass plate of module.
The glass plate module of completion is placed in thermal shock case (Model SV4-2-2-15EnvironmentalTest
Chamber (SV4-2-2-15 types environmental test chamber), Envirotronics, Inc. (Grand Rapids, MI)) in, and undergo
84 temperature cycles.Temperature cycles all comprise the following steps each time：Module is cooled to -35 DEG C, is then protected at such a temperature
Hold 1 hour, oven temperature single step is then increased to 85 DEG C, then kept for 1 hour at such a temperature.After temperature cycles, from mould
Laminate film is removed on block, and checks wrinkle.If there is visible wrinkle in laminate film after thermal shock test, that is, think product
Can be underproof.
Figure 13 a show that the section thickness of the height change of the film laminate using the film preparation of example 1 is distributed, Figure 13 b
Show that the section thickness of the height change of the film laminate using the film preparation of example 2 is distributed, both are above-mentioned thermal shock
Situation after experiment.
The lamilate that the film of standby instance processed 1 and example 2 is formed, and convert thereof into adaptation 32 " diagonal L CD-TV
(660mm×473.8mm).Each part is arranged on two 3.2mm thickness, the gathering for 3mm in the fixed interval (FI) of thickness direction
Between carbonic ester sheet material.Polycarbonate sheet is clipped together to keep module integrity.These modules are arranged on 85 DEG C
In baking oven, and 473.8mm edges are fixed in vertical direction.Module is preserved 96 hours at 85 DEG C.Module is taken from baking oven
Go out, room temperature is cooled to before dismounting.Then deformation and the change in size of laminated part are checked.Use the layer of the film preparation of example 1
Zoarium shows sizable deformation.When setting on flat surfaces, the diametrical corners of part are flat relative to test surfaces
Face has been higher by about 10mm, and shows the obvious ripple having perpendicular to the MD directions of film.By contrast, the film of example 2 is used
The lamilate of preparation is completely flat, and parallel to the plane of test surfaces, does not all show with ripple in any direction.
Although present invention discusses the advantage between the polarizer of backlight using the substantially film of uniaxial orientation, no matter
Whether between polarizer, substantially the film of uniaxial orientation generally can in the backlight have practicality for they.It is substantially single
The film of axle orientation can show other properties, and these properties make them be better than other optical films in backlight application.It is substantially single
The film of axle orientation can provide desired to the optical film with required mechanical performance with the cost advantage relative to other optical films
Low haze.
Except as otherwise noted, it is also intended to when otherwise mentioning " backlight " nominal homogeneous suitable for being provided its intended application
Other extension surface illuminators of illumination.Such other devices can produce polarization to export or unpolarized output.Example includes lamp
Case, direction board, stereo luminous character, and it is designed for the general illumination dress of indoor (such as family or office) or outdoor application
Put, sometimes referred to as " light fixture ".It should also be noted that side-light type device may be structured to it is (that is, mentioned above from two relative first type surfaces
" front reflector " and " rear reflector ") send light, in this case, front reflector and rear reflector are fractional transmission
Reflector.This device can illuminate the two independent LCDs or other graphics components for being arranged on backlight opposite side.At this
In the case of kind, front reflector and rear reflector can be identical or similar construction.
Except the degree that may be directly contradicted with the present invention, all references cited herein and disclosed full text are all bright
It is really incorporated herein by reference.There is discussed herein exemplary embodiment of the invention, and with reference in the scope of the invention
Possible modification.Without departing from the scope of the invention, these and other variants and modifications in the present invention are for ability
Be will be evident that for the technical staff in domain, and it is to be understood that the present invention is not limited to exemplary embodiment illustrated herein.
Therefore, the present invention is only limited by claims provided below.
Claims (4)
1. a kind of optical film, including：
Reflection type polarizer, the reflection type polarizer has thang-kng axle；With
Stretching polyethylene terephthalate film, the stretching polyethylene terephthalate film has：X-axis, it is most
On big draw direction；Z-axis, its plane perpendicular to the stretching polyethylene terephthalate film；And y-axis, its perpendicular to
Both the x-axis and the z-axis, the stretching polyethylene terephthalate film are laminated into the reflection type polarizer
On；
The refractive index n along the x-axis of wherein described stretching polyethylene terephthalate filmx, along the folding of the y-axis
Penetrate rate nyWith the refractive index n along the z-axiszSo that the stretching polyethylene terephthalate film has the pin in following formula
To θsfThe refractive index symmetric points that are given of solution：
But, in the absence of for θ in following formulasaSolution：
2. a kind of optical film, including：
Reflection type polarizer, the reflection type polarizer has the first first type surface and the second first type surface；
First stretching polyethylene terephthalate film, the first stretching polyethylene terephthalate film is viscous with first
Mixture layer is laminated on first first type surface of the reflection type polarizer；
Second stretching polyethylene terephthalate film, the second stretching polyethylene terephthalate film is viscous with second
Mixture layer is laminated on second first type surface of the reflection type polarizer；With
Optical layer, the optical layer is set near the described second stretching polyethylene terephthalate film so that described second
Stretching polyethylene terephthalate film is located between the optical layer and the reflection type polarizer；
The first stretching polyethylene terephthalate film and the second stretching polyethylene terephthalate film are equal
Have：X-axis, it is on maximum tension direction；Z-axis, its perpendicular to described first stretching polyethylene terephthalate film and
The plane of the second stretching polyethylene terephthalate film；And y-axis, it is perpendicular to both the x-axis and the z-axis；
Wherein described first stretching polyethylene terephthalate film and the second stretching polyethylene terephthalate
The refractive index n along the x-axis of film eachx, along the refractive index n of the y-axisyWith the refractive index n along the z-axiszSo that
The first stretching polyethylene terephthalate film and the second stretching polyethylene terephthalate film are respectively provided with
θ is directed in following formulasfThe refractive index symmetric points that are given of solution：
But, in the absence of for θ in following formulasaSolution：
3. a kind of optical film, including：
Reflection type polarizer, the reflection type polarizer has thang-kng axle；With
Stretching polyethylene terephthalate film, the stretching polyethylene terephthalate film has：X-axis, it is most
On big draw direction；Z-axis, its plane perpendicular to the stretching polyethylene terephthalate film；And y-axis, its perpendicular to
Both the x-axis and the z-axis, the stretching polyethylene terephthalate film are laminated into the reflection type polarizer
On；
Wherein described stretching polyethylene terephthalate film is mainly orientated in one direction.
4. a kind of optical film, including：
Reflection type polarizer, the reflection type polarizer has the first first type surface and the second first type surface；
First stretching polyethylene terephthalate film, the first stretching polyethylene terephthalate film is viscous with first
Mixture layer is laminated on first first type surface of the reflection type polarizer；
Second stretching polyethylene terephthalate film, the second stretching polyethylene terephthalate film is viscous with second
Mixture layer is laminated on second first type surface of the reflection type polarizer；With
Optical layer, the optical layer is set near the described second stretching polyethylene terephthalate film so that described second
Stretching polyethylene terephthalate film is located between the optical layer and the reflection type polarizer；
The first stretching polyethylene terephthalate film and the second stretching polyethylene terephthalate film are equal
Have：X-axis, it is on maximum tension direction；Z-axis, its perpendicular to described first stretching polyethylene terephthalate film and
The plane of the second stretching polyethylene terephthalate film；And y-axis, it is perpendicular to both the x-axis and the z-axis；
Wherein described first stretching polyethylene terephthalate film and the second stretching polyethylene terephthalate
Film has mainly been orientated in one direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4111208P | 2008-03-31 | 2008-03-31 | |
| US61/041,112 | 2008-03-31 | ||
| CN200980114664.8A CN102066994B (en) | 2008-03-31 | 2009-03-30 | Optical film |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980114664.8A Division CN102066994B (en) | 2008-03-31 | 2009-03-30 | Optical film |
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| CN106932964B CN106932964B (en) | 2020-09-29 |
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| US (1) | US9664834B2 (en) |
| EP (1) | EP2265981A1 (en) |
| JP (2) | JP2011516921A (en) |
| KR (2) | KR101926954B1 (en) |
| CN (2) | CN102066994B (en) |
| MY (1) | MY167536A (en) |
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- 2009-03-30 CN CN200980114664.8A patent/CN102066994B/en not_active Expired - Fee Related
- 2009-03-30 JP JP2011503066A patent/JP2011516921A/en active Pending
- 2009-03-30 MY MYPI2010004534A patent/MY167536A/en unknown
- 2009-03-30 CN CN201710070956.2A patent/CN106932964B/en not_active Expired - Fee Related
- 2009-03-30 US US12/935,485 patent/US9664834B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2009123949A1 (en) | 2009-10-08 |
| EP2265981A1 (en) | 2010-12-29 |
| KR101926954B1 (en) | 2018-12-07 |
| KR20110002046A (en) | 2011-01-06 |
| KR20170005381A (en) | 2017-01-12 |
| JP6139572B2 (en) | 2017-05-31 |
| JP2011516921A (en) | 2011-05-26 |
| CN102066994A (en) | 2011-05-18 |
| KR101691671B1 (en) | 2016-12-30 |
| CN102066994B (en) | 2017-03-22 |
| JP2015096968A (en) | 2015-05-21 |
| TW200946997A (en) | 2009-11-16 |
| CN106932964B (en) | 2020-09-29 |
| US9664834B2 (en) | 2017-05-30 |
| TWI557446B (en) | 2016-11-11 |
| MY167536A (en) | 2018-09-05 |
| US20110103036A1 (en) | 2011-05-05 |
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